Lock-joint coupling.



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` Patented (lef. lI, i901. H. A. T|NKHAM. LCK JINT UPLING.

(Application Bled Apr. 13, 1901.]

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YH: Nonms PETERS co.. PucTo-L 1' UNrrno STATES nraNr Ormea IIOIVARD A. TINKI-IAM, OF NORTON, MASSACHUSETTS, ASSIGNOR TO TIIE VHITE WARNER COMPANY, OF TAUNTON, MASSACHUSETTS.

COUPLING.

SPECIFICATION forming part of Letters PatentNo. 683,670, dated October 1, 1901.

Application filed April 13, 1901.

To @ZZ whom, it may concern:

Be it known that I, HOWARD A. TINKHAM, of Norton, in the county of Bristol and State of Massachusetts, have invented certain new and usefulImprovements in Loek-Joint Couplings, of which the following is a specification.

My invention relates to a lock-joint coupling.

It is especiallyintended for use in connecting an auxiliary radiator to the main radiator of a furnace or stove, and for convenience of illustration I have shown in the accompanying drawings the invention so applied; butitis notlimited to such application.

The invention will now be fully described, and the novel features will be particularly pointed out in the claims at the close ot" the specification.

In the drawings, Figure lis a horizontal section on line 1 l of Fig. 2, representing the dome and auxiliary radiator and connections of a hot-air furnace, the casing and some unnecessary parts being omitted. Fig. 2 is a vertical section on line 2 2 of Fig. 1. Fig. 3 is a side elevation ot the dome and outlet of the radiator. Fig. 4 is an inside elevation of the hanger or \collar which goes over the dome-outlet and to which the auxiliary radiator and the diaphragm-plate are attached. Fig. 5 is a vertical section on line 5 5 of Fig. 4. Fig. Gis a horizontal section on line 6 6 of Fig. 4 when the collar is hung in the groove 8 on the flue 2.

The dome l has attached thereto or preferably cast integral therewith a nose or outletflue 2, which forms the flue to the auxiliary radiator 3. This flue is preferably arched or otherwise non-circular, with a dat bottom 4, depressed near its end to form a rest 15 for the diaphragm-plate 5, so as to produce a flush joint. The dome is formed with a iange 6 around the bottom, which shuts down on the section 7 beneath it and which constitutes the combustion-chamber. The iiue 2 is formed with a peripheral groove 8 on the sides and preferably extending around over the top near the outer end to receive the beaded part 10 of collar 9. The collar 9 is formed with a yoke 20, having an internal bead or tongue 10,whieh fits in the groove 8. The yoke preferably has on its upper side a forked flange Serial No. 55,718. (No model.)

11, whose two fingers include between them the boss 12, rising from the crown of the flue 2, to give greater stability to the collar 9.

.The collar 9 is formed with an outwardlyradiating flange 2l, having bolt or rivet holes 13 by which the radiator 3 is attached to it, the radiator being also otherwise supported at the bottom. A horizontal flange 14, project ing from said collar at the bottom of the opening, lies on the depressed portion 15 of the bottom of the flue 2 to help support the diaphragm-plate 5 and forms a iiush joint with the bottom 4. The diaphragm-plate 5 is preferably bolted to the depressed portion 15, but not necessarily so. The arms 16 of the diaphragm are secured to the plate 5. The diaphragm-plate 5 extends across the radiator 3 and into the draft-collar 17. The damper 18 controls the draft, so as to produce a direct or indirectdraft, as desired.

19 is the collar for the smoke-pipe.

What I claim is- 1. The herein-described coupling compris; ing a tubular member grooved on its outer periphery, and a collar having a yoke which is formed with a tongue on its inner periphery adapted to fit in said groove when the yoke is slipped down over said tubular mem ber, said tubular member and yoke having on their upper side portions which engage each other and assist in preventing rotation, substantially as described. v

2. In a stove or furnace, a dome having a laterally-projecting outlet-iiue, said outletflue having a groove formed in its outer periphery, and a collar formed with a yoke have ing on its inner periphery a tongue which [its in said groove when the yoke is slipped down over said flue, thereby securing the collar to the flue, a radiator, and an outlet-flue therefrom, a diaphragm which extends from the bottom of the dome outlet-tine into the outlet-flue from the radiator and a damper which controls the outlet from the radiator on the upperside of said diaphragm,-substantially as described.

3. In a stove or furnace, a dome having a laterally-projecting outlet-flue, said outlet; flue having a groove in its outer periphery and having a bottom with a depressed end portion, a collar formed with a yoke having` iod on its inner periphery n tongue which fits in compartments, and a damper which controls lo said groove when the yoke is slipped `down the upper compartment, substantially as deover said Hue, Juhereby securing the collar to scribed.

the flue, a radiator, an outlet-flue therefrom, In testimony whereof I have ai'iXed my siga diaphragm whose inner edge rests on the nature in presence of two Witnesses.

depressed portion of the bottom of the dome- HOWARD A. TINKHAM. outlet and which extends through che said Vvvitnesses: radiator into the outlet-Hue therefrom dividi VILLIAM A. COPELAND,

ing said last-mentioned outlet-flue into two I ROBERT TWALLACE. 

